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66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
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/* Implement the snprintf function.
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Copyright (C) 2003 Free Software Foundation, Inc.
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Written by Kaveh R. Ghazi <ghazi@caip.rutgers.edu>.
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This file is part of the libiberty library. This library is free
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software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option)
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any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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As a special exception, if you link this library with files
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compiled with a GNU compiler to produce an executable, this does not cause
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the resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why
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the executable file might be covered by the GNU General Public License. */
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/*
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@deftypefn Supplemental int snprintf (char *@var{buf}, size_t @var{n}, const char *@var{format}, ...)
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This function is similar to sprintf, but it will print at most @var{n}
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characters. On error the return value is -1, otherwise it returns the
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number of characters that would have been printed had @var{n} been
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sufficiently large, regardless of the actual value of @var{n}. Note
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some pre-C99 system libraries do not implement this correctly so users
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cannot generally rely on the return value if the system version of
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this function is used.
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@end deftypefn
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*/
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#include "ansidecl.h"
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#ifdef ANSI_PROTOTYPES
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#include <stdarg.h>
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#include <stddef.h>
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#else
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#include <varargs.h>
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#define size_t unsigned long
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#endif
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int vsnprintf PARAMS ((char *, size_t, const char *, va_list));
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int
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snprintf VPARAMS ((char *s, size_t n, const char *format, ...))
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{
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int result;
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VA_OPEN (ap, format);
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VA_FIXEDARG (ap, char *, s);
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VA_FIXEDARG (ap, size_t, n);
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VA_FIXEDARG (ap, const char *, format);
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result = vsnprintf (s, n, format, ap);
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VA_CLOSE (ap);
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return result;
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}
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